One of the sources used to prove that weightstones shouldn't effect feral forms in fact explicitly states that "The bonus damage from Weightstones and Sharpening Stones also does work." (see link below). I think we need some GM guidance as to what we can and cannot do here since there is a lot of conflicting information out there. It would be a shame to implement this and nerf the few feral druids that actually put in the over the top effort to be viable in raids. I for one will probably quit playing on Nostalrius if they implement this as it will render all of the hard work I've done to bring feral druid to a viable end-game level completely useless.
http://vanilla-wow.wikia.com/wiki/Druid